그 인텐트 필터의 priority 는 그런 의미가 아닐텐데요..
그리고 값은 -999 ~ 999 사이로 줄 수 있다고 나와있네요
android:priority
It controls the order in which broadcast receivers are executed to receive broadcast messages. Those with higher priority values are called before those with lower values. (The order applies only to synchronous messages; it's ignored for asynchronous messages.)
Use this attribute only if you really need to impose a specific order in which the broadcasts are received, or want to force Android to prefer one activity over others.
The value must be an integer, such as "100". Higher numbers have a higher priority. The default value is 0. The value must be greater than -1000 and less than 1000.
100